Tzinfo-Data Present But Not Seen

tzinfo-data issue when starting new rails project

Managed to resolved the issue.

Steps:
1. Remove ", platforms: [:mingw, :mswin, :x64_mingw, :jruby]" in Gemfile for "gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]"

2. Run gem uninstall tzinfo-data

3. Run bundle install

After reinstalling back tzinfo-data, the rails server is able to start up.

Thank you for suggestions and effort to try and help me to resolve this issue.

failed to build rails server cause of tzinfo

There's a bug in Bundler that means there's no valid platform value that will match 64-bit Ruby 3.1 on Windows.

If the gem 'tzinfo-data line in your Gemfile includes a platforms option, Bundler will exclude tzinfo-data from the bundle and you'll get the TZInfo::DataSourceNotFound error.

The solution is to remove the platforms option from the tzinfo-data line in the Gemfile and then run bundle install:

gem 'tzinfo-data'

TZInfo::DataSourceNotFound error starting Rails v4.1.0 server on Windows

Resolving the Error

To resolve this error, you'll need to make sure that the tzinfo-data gem is being included in your Gemfile.

First of all, check your Gemfile to see if there is an existing reference to tzinfo-data. If there isn't already a reference, then add the following line:

gem 'tzinfo-data'

You may find that there is already a line like the following:

gem 'tzinfo-data', platforms: [:mingw, :mswin]

If you are using a 64-bit version of Ruby on Windows, then add :x64_mingw to the list of platforms as follows:

gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw]

Alternatively, you can remove the platforms option altogether.

Note that there is a bug in Bundler that means there's currently no platform option that will match 64-bit Ruby 3.1 on Windows. The solution here to remove the platforms option.

After doing this, run bundle update at the command line to install the tzinfo-data gem and you'll then be able to start your Rails server or console.

Background

The TZInfo::DataSourceNotFound error is being raised by TZInfo, a dependency of the Active Support component of Rails. TZInfo is looking for a source of time zone data on your system, but failing to find one.

On many Unix-based systems (e.g. Linux), TZInfo is able to use the system zoneinfo directory as a source of data. However, Windows doesn't include such a directory, so the tzinfo-data gem needs to be installed instead. The tzinfo-data gem contains the same zoneinfo data, packaged as a set of Ruby modules.

Rails generates a default Gemfile when the application is first created. If the application is created on Windows, then a dependency for tzinfo-data will be included. However Rails (up to version 4.1.x) omitted :x64_mingw from the list of platforms and therefore didn't work correctly on 64-bit Windows versions of Ruby.

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